add comment
Merge pull request #2 from s-aita/add_comment

add comment
add_comment2 indent -> comment
Merge pull request #3 from s-aita/add_comment2

add_comment2
delete debug message

fixes #4
Merge pull request #5 from s-aita/delete_debug_message

delete debug message
new_branch_commit
Merge pull request #6 from g-yamamoto/new_branch2

new_branch_commit
commit